Electric bell.



C. F. MEAD & L. E. RICHMOND.

ELECTRIC BELL.

APPLICATION FILED Aums. 1913.

1,145,253. Patented July 6, 1915."

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(MAMLJ I UNITED STATES PATENT OFFICE.

cam. r. iu'EAn AND LOUIS E. RICHMOND, or CLEVELAND, omo, ASSIGNOZBS 'ro THE MEAD ELECTRIC SIGNAL COMPANY, or CLEVELAND, 01110, A CORPORATION. 01

OHIO.

ELECTRIC BELL.

Specification of Letters Patent.

Patented July 6, 1915'.

Application filed August 1 5, 1913. Serial No. 784,995.

T all whom it may concern:

Be it known that we, CARL F. MEAD' and LOUIS EQRrcHMoNo, citizens of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements plunger, the normal position of which and.

the throw of which may be adjusted by suitable mechanism carried by the tubular core.

The invention may be further briefly. summarized as consisting in the construction and combination of parts hereinafter set forth in the following description, drawings and claims.

Referring to the drawings, Figure 1 is a view partly in section partly in elevation showing the device; and Fig. 2'is a detail front elevation of the lower portion of the magnet.

In carrying out the invention any pre ferred form and construction of parts may be employed,-but I have shown one arrange-- ment in the drawings which is effective in operation, and in such embodiment, 1 represents a suitable casing or box provided with an extension 2 upon which a gong 3 is mount-.

ed. The casing 1 isprovided with an opening 4 in its top and an opening 5 in its bottom in alinement with the opening. 4 in the top. Openings 6 are arranged upon the side of the casing for receiving insulators 7 through which the leads, not shown, pass into the bell. Mounted within the box and supported by screws 8 extending through the sides is a partition 9 of insulating material. This partition is provided with an opening 10 in alinement with the openings 4 and 5. Secured in this partition 9 in any suitable manner, and in the opening 10 is a tubular solenoid core 11 of brass or any'other nonmagnetic material. This tubular core is pro vided below the partition with long1tud1-' nally disposed slots 12 arranged in opposi tion in the walls of the tube.

These slots open out at the end of the tube for a purpose to be described. Secured on this core above the partition is a solenoid coil 13, the leads of'Which are connected to washers or other connectors 14mounted in the block, and these connectors are in turn coupled to the leads, not shown, which enter through the insulators 7. Arranged at the lower end of the coil 13 and between it and the partition 9-are suitable insulating washers 15, for holding These washers are held in the coil in shape. place by a brass or other non-magnetic plate 16 which is provided with an ear 17 extending beyond the coil and bent down in front ofthe edge of the'partition, as shown in Fig. 2. A set screw 18 is arranged in this ear and it bears against the. front side of the insulating block and causes a bite on the tubular core of the solenoid, thereby holding it from rotation and movement in the device.

Slidably mounted in the slots 12 is a nut 19 erably of felt. This bufi'er engages the nut 19.

In operation current is supplied to the bell intermittently and the action of the solenoid coil upon the plunger 23 is similar in all respects to. the action of any solenoid coil upon its core, the result being that the plunger is thrown up into engagement. with the bell. The stroke may be varied during operation by rotating the thumb piece 21 since rotation of this part causes the rotation ofthe internally threaded tube 20 and a change in position of the nut 19 which forms the lower stop or abutment for the magnetic core or plunger of the solenoid.

Having described our invention, we claim 1. In a bell, a gong, and striking mechanism therefor comprising a solenoid coil, a non-magnetic tubular core mounted in said coil and extending below the coil and having slots therein, a nut mounted in said tube and having portions extending. through sald slots, an adjusting sleeve threadedonto said nut, means for rotating said sleeve, and a magneticplunger slidably mounted in the tubular core and adapted to engage said nut.

2. In a bell, a gong, and striking mechanism therefor comprising a solenoid coil, a non-magnetic tubular core mounted in said coil and extending below the coil and having slots therein, a nut mounted in said tube and having portions extending through said slots, an adjusting sleeve threaded onto said nut, means for rotating said sleeve, a magnetic plunger slidably mounted within said tubular core, and a buffer on the endof said plunger adapted for engagement with said nut.

3. In an electric bell, a casing,'a gong supported with respect to said casing, said casing being provided with openings in opposite walls and in alinement with the gong, a solemasses noid coil mounted in said casing, a tubular core mounted in said solenoid and arranged in alinement with the openings in said casing, said tubular core extending below the coil and having longitudinally disposed slots opening out at the end, a nut arranged in said slots and projecting beyond the periphery of the tubular core, an internally threaded adjusting sleeve engaging said nut and arranged between the end of said solenoid and the casing, and a thumb piece secured to said adjusting sleeve.

In testimony whereof we affix our signatures in presence of two witnesses as follows.

CARL F. MEAD. LOUIS E. RICHMOND.

Witnesses:

ALTON H. BEMIS, C. H. TRESCH. 

